Current Amplifying image sensor with buried driving electrode has been proposed to increase photosensitivity and dynamic range. The characteristics of the image sensor with 1, 000×1, 000 cells/cm2 were simulated at the readout-current saturation region. The simulation are carried out by one dimensional depletion approximation and three dimensional numerical analysis. The simulations clarified that the current amplifiing factor at the saturation region and the charge handling capability reaches 42 and 1.35×105holes/cell, respectively. The simulations also clarified that the ratio of signal current to stored signal charge increases in propotion to the inverse of a cell size.
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